Multiple Ubuntu Linux kernel vulnerabilities patched
Multiple Linux kernel flaws in Ubuntu 14.04 through 26.04 enable arbitrary code execution, privilege escalation, and data breach.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 40 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2026-31431 and CVE-2026-46300 as exploited in the wild.
CERT-FR has published a security advisory detailing multiple vulnerabilities discovered in the Linux kernel used across multiple Ubuntu releases, spanning from Ubuntu 14.04 ESM through Ubuntu 26.04 LTS. The vulnerabilities enable attackers to achieve arbitrary code execution, privilege escalation, compromise data confidentiality, and bypass security policy controls. The advisory references 40 distinct CVE identifiers, with patches available through eight separate Ubuntu security bulletins (LSN-120-1, USN-8350-1 through USN-8374-1) released on 1-2 June 2026.
The affected Ubuntu versions include both long-term support (LTS) releases and extended security maintenance (ESM) variants, meaning a broad installed base is potentially impacted. Defenders should prioritize kernel patching across all listed Ubuntu distributions. The advisory does not indicate active in-the-wild exploitation, but the range of attack vectors (code execution, privilege escalation, confidentiality breach) and the breadth of affected versions warrant immediate patch assessment and deployment.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0695
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